🌱 Week 3 – End of Vegetative Stage
10/04 (Day 22): Watered with 500 ml at pH 5.7, EC 1300. Solution included 2.5 ml/L CalMag + 1.4 ml/L Coco A + 1.4 ml/L Coco B — Deeper Underground removed from the mix starting today. Runoff measured EC 700, pH 7.0. Considering removing a few fan leaves to allow more light penetration to the lower branches.
10/05 (Day 23): No watering today — pots still heavy and moist. The tips of new leaves are showing a very light green to yellowish color. Planning to start micronutrient supplementation directly in the nutrient solution in two days. Plants continue stretching rapidly; one grew 4 cm in the last 24 hours. Roots are now protruding through the fabric pots, indicating full root colonization.
10/06 (Day 24): Pistils visible on all plants — flowering will begin next week 🌸. Tried increasing light intensity to 20k lux, but plants showed stress, so it was reduced again. Still not obtaining reliable results with the lux meter, so I’ve ordered a PAR meter to better control light levels. Watered with 1 L of the same solution as Day 22. Runoff EC rising slightly to 750, pH stable at 7.0.
Week 3 Summary — End of Vegetative Stage
Strong vegetative finish: vertical growth continued steadily, some plants growing 4 cm in 24 h.
Root zone fully colonized — roots visible through the fabric pots.
All plants showing pistils → clear sign of transition to flowering.
Light management tricky this week; stress appeared above 20k lux. PAR meter ordered for better control.
Nutrient mix stable at EC 1300 (2.5 CalMag + 1.4 A/B). Deeper Underground discontinued.
Runoff EC ~ 700–750, pH ~ 7.0 → substrate still buffered high, but plants adapting well.
🌼 ➡️ Plan for Week 4 – Flowering Week 1
Nutrients:
Transition feed: keep CalMag at 2.0–2.5 ml/L, A/B around 1.4–1.6 ml/L.
Introduce bloom additives gradually (PK boosters or bloom A/B if applicable).
pH: Keep irrigation at 5.6–5.7 to slowly bring substrate down from 7.0.
EC: Increase gradually toward 1400–1500 µS/cm as flowers initiate.
Lighting: Use PAR meter to maintain 300–400 µmol/m²/s (~15–18k lux) during transition.
VPD: Raise to 1.0–1.2 kPa for better transpiration and nutrient flow.
Defoliation: Light removal of large fan leaves if necessary to expose lower sites.
Observation: Watch for stabilization of new growth color and confirm consistent pre-flowering on all plants.